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[http://proquest.safaribooksonline.com/book/databases/rpg/9781583470879Functions in Free Format RPG IV] [http://proquest.safaribooksonline.com/book/databases/rpg/9781583470558 Free Format RPG IV] [http://proquest.safaribooksonline.com/book/databases/rpg/9781583470640 The Modern RPG IV Language] [http://proquest.safaribooksonline.com/book/databases/rpg/0738415332] Who Knew that you Could do that with RPG IV]